William henry heeson



(No Model.) 4

W. H. HEESON.

FURNACE GRATB BAR.

No. 499,732. Patented June 20, 1893.

UNITED STATES PATENT OFFICE.

XVILLIAM HENRY HEESON, OF TORONTO, CANADA.

FURNACE GRATE-BAR.

SPECIFICATION forming part of Letters Patent N 0. 499,732, dated June 20, 1893.

Application filed January 11, 1893. Serial No- To all whom it may concern:

Be it known that I, WILLIAM HENRY HEE- sON, engineer, of the city of Toronto, in the county of York and Province of Ontario, Canada, have invented certain new and useful Improvements in Rocking Grate-Bars for Furnaces; and I hereby declare the following is afull, clear, and exact description of the same.

This invention relates to certain new and useful improvements in rocking-grate-bars for furnaces and the object of the invention is to so construct the grate bar that the largest possible volume of air will be admitted therethrough to the fire to facilitate the decomposition of the fuel and to render the combustion as nearly perfect as possible within the fire-box; and the grate-bar consists essentially of two central longitudinal webs connected together at their ends and intermediately between the ends, a passage between these central longitudinal webs for the admission of a draft of air from the under side of the grate-bars to the fire; a series of laterally extending ribs joined or connected to each of the central longitudinal webs at their inner ends and to longitudinal ribs at their outer ends, each of these laterally extending ribs having one or more steps formed 011 its upper face; the side face of the longitudinal rib provided with a series of vertical corrugations the concave portions of which preferably taper from the bottom to the top of the longitudinal rib and the convex portions consequently tapering from the top to the bottom; each of the laterally extending ribs is provided on its under side with a supporting rib the edge of which is concaved to admit of the free passage of the air through the spaces between the laterally extending ribs; the whole device being constructed and arranged as hereinafter more fully set forth in the specification and more particularly pointed out inthe claims.

In the drawings :Figure 1 is a perspective view of a section of a furnace showing three grate-bars mounted therein. Fig. 2 is an enlarged perspective view of one of the gratebars shown in Fig. 1 of the drawings looking at the said grate-bar from the end opposite to that shown in Fig. 1. Fig. 3 is a cross sectional view on the lines aa Fig. 2.

Like numerals of reference --refer to like 458.095. (No model.) Patented in England April 11, 1892, No. 6,960.

parts throughout the specification and draw- 111,28

In the drawings, 1, refers to the walls of the furnace in which are formed suitable bearings for the spindle 2 of the grate-bars. Each of the grate-bars consists of two central longitudinal webs 3 extending from the front to the rear of the furnace and coupled together at each end by means of end pieces 4 and at their middle by means of an intermediate piece 5.

Between the central longitudinal webs 3 are two passages 6 for the admission of a draft of air from the under side of the grate bar centrally through the web to the fire. It might here be stated that the walls of these passages 6 taper from the bottoms to the tops, that is, the bottoms of these passages are larger thanthe tops for the purpose of giving force to the air admitted therethrough.

A series of laterally extending ribs 7 are connected at their innerends and to each of the central longitudinal webs 3 and are connected at their outer endsto the longitudinal ribs 8. Each of'the lateral ribs'7as shown in the drawings has formed on its top or upper face two steps 9. Each of the longitudinal ribs 8 has formed on its side face a series of vertical corrugations the concaved and convexed portions of which are respectively numbered 10 and 11.

Extending downwardly from one end of each of the grate bars and parallel to each other are two lugs 12 separated by a space 13. The lugs 12 of each of the grate-bars are arranged at the same end of the furnace and passing through the spaces 13, between these lugs 12, is a link 14 pivotally secured to each of the lugs 12, by means of bolts passing through the openings 1.5 in the lugs 12 and corresponding openings in the link 14.

The spindle 2 of the middle grate-bar is provided with a square shoulder 2 to which is fitted the cranked shaker. The movement of the middle grate-bar causes a similar and spontaneous movement on the part of each of the remaining grate-bars and the clinkers and ashes are moved toward the opening formed between the grate-bars during the operation of shaking. During the operation of shaking the steps 9 prevent the return of the clinkers and ashes to their original positions in the event of their meeting an obstruction in their passage into the ash pit through the opening formed between the grate-bars. In the event of the clinkers binding between the upper face of the lateral ribs 7 and the side face of the longitudinal ribs 8 they are firmly held by: the steps 9 and ground into small pieces between the upper face of the lateral ribs and the corrugations 9 on the side face of the longitudinal ribs 8.

Owing to the concaved portions 10 of the corrugations on the side faces of thelongitudinal ribs 8 cinders and clinkers entering the upper end of the said portions-1O are permitted todrop through into the ash pit 16. It will also be noticed that to strengthen each of the lateral ribs 7 a supporting rib 17 is formed on the under side of the said lateral ribsvand is connected to the central depending portion 3 of the longitudinal web 3. It will also be noticed that the edges of the ribs 17 are cut awayin a curved manner to permit of the air passing freely along the under sides of the ribs 7 and into the fire box through the spaces between the said lateral ribs 7. It might also here be stated that owing to the peculiar formation of the side faces of the longitudinal ribs 8 the air is permitted to pass into the fire box through the concaved portions'lO.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, isa 1. A furnace grate-bar comprising two centrally longitudinal webs connected together at each end and intermediately between the ends to form a passage therethrough for the admission of a draft of air from the under side of the grate bars to the fire, a series of laterally extending ribs joined or connected at their inner ends to the centrally longitudinal webs, and a longitudinal rib connected to their outer ends one or more steps formed on the upper face of each of the laterally extending ribs, substantially as described.

2. A furnace grate-bar comprisingtwo centrally longitudinal webs connected together at each end and intermediately between the ends to form a passage therethrough for the admission of a draft of air from the under side of the grate-bars to the fire, a series of laterally extending ribs joined or connected at their inner ends to the centrally longitudinal Webs, and a longitudinal rib connected to their outer ends, one or more steps formed on-the upper face of each of the laterally extending ribs, a series of vertical corrugations formed on the side face of the longitudinal rib, the concaved portions of the said corrugations tapering from the bottom to the top of the longitudinal rib and the convex portions tapering from the top to the bottom, substantially as described.

A furnace grate-bar comprising two centrally longitudinal webs connected together at each end and intermediately between the ends to form a passage therethrough for the admission of a draft of air from the under side of the grate bars to the fire, a series of laterally extending ribs joined or connected at their inner ends to the central longitudinal webs and a longitudinal rib connected to their outer ends, one or more steps formed on the upper face of each of the laterally extending ribs, each of the laterally extending ribs provided on its under side with a supporting rib the edge of which is concaved, a series of vertical corrugations formed on the side face ofthe longitudinal rib, the concaved portions of the said corrugations tapering from the bottom. to'the top of thelongitudinal rib and the convex portions tapering from the top to the bottom, substantially as described.

4. A furnace grate bar comprised of a central longitudinal web, a series of laterally extending ribs'joined at either inner ends to the central web and located on each side thereof, a longitudinal rib connected to the outer end of the laterally extending ribs each of the laterally extending ribs having one or more steps formed on its upper face and each of the longitudinal ribs having a series of vertical corrugations formed on its side face, substantially as set forth. Toronto, July 6, 1892. 7 WILLIAM HENRY HEESON. In presence of- CHARLES H. RIoHEs, M. ANGELL. 

